I also had a leak on my 2004 Wildcat when I owned it. I got the tip for fixing itfrom the Wildcat Owners Club. If it's leaking from the reservoir try the following:
1. Remove the fluid from the reservoir using a hand suction/siphon pump
2. Remove the reservoir from the pump via four (4) attachment bolts.
3. Carefully remove the large o-ring which seals the reservoir to the pump.
You can replace it or try cleaning and reinstalling. Most folks replace it. I took my old one to a tractor repair/hydraulic shop and found a replacement.
4. Clean the groove that the o-ring sits in with brake cleaner
5.Coat the new ring with ATF ( automatic transmission fluid) - make sure that you use the recommended type.
6. Reinstall the reservoir and fill it back up with ATF
If you don't want to replace the o-ring, you can try the following:
Follow steps 1-4 above
5. Fill the oring groove on the pump with Form-a-gasket Red RTV.
6. Reinstall o-ring
7. Wait for the form-a-gasket to dry
8. Reattach the fluid reservoir.Fill fluid reservoir with ATF
It was a fairly simple repair and much less expensive than buying a new pump and hoses( over $1100)
2015 Rockwood 8329SS TT
2004 Chevy 2500HD D/A 4X4 CC SB
Andersen Weight Distribution hitch